Practice Test Geeks(VDV) Voice Data Video Technician Certified Practice Test
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Network Infrastructure Flashcards

7 cards from real VDV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Network Infrastructure flashcards as text

  1. What is the minimum bend radius for a 4-pair UTP Cat6 cable during installation?

    Answer: 4 times the cable diameter

    TIA-568 specifies a minimum bend radius of 4 times the cable's outer diameter for 4-pair UTP during and after installation.

  2. In a VoIP deployment over a converged network, what mechanism is used to prioritize voice traffic over data?

    Answer: Quality of Service (QoS)

    QoS mechanisms classify and prioritize voice packets to ensure low latency and jitter, which are critical for intelligible VoIP calls.

  3. A technician measures -3.5 dB insertion loss on a fiber run. What does this indicate?

    Answer: Signal loss is within acceptable limits for most applications

    An insertion loss of -3.5 dB is within the acceptable range for most short-distance fiber links, as budgets commonly allow up to -3 dB per connector and more for the total link.

  4. What does OTDR stand for and what is its primary use?

    Answer: Optical Time Domain Reflectometer — locates faults and measures loss in fiber cables

    An OTDR sends light pulses into fiber and analyzes reflections to locate faults, splices, and connectors, and measure distance and loss.

  5. Which cable category is the minimum required to support 10GBASE-T Ethernet up to 55 meters?

    Answer: Cat6

    Cat6 cable supports 10GBASE-T up to 55 meters, while Cat6A extends this to the full 100-meter channel length.

  6. What is the maximum number of cables allowed in a horizontal cable bundle before fire code requires separation or conduit?

    Answer: It depends on the cable type and applicable NEC/local code

    The NEC and local fire codes dictate bundling limits, which vary by cable rating (CM, CMR, CMP) and installation location, with no single universal number.

  7. When using a cable certifier, what parameter confirms the cable can support the intended application (e.g., Cat6 1G Ethernet)?

    Answer: PASS result against the applicable TIA or ISO channel standard

    A cable certifier must show a PASS result against the relevant TIA-568 or ISO 11801 standard, which tests all required parameters simultaneously.